Linear gain control amplifier

H - Electricity – 03 – G

Patent

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Details

H03G 3/20 (2006.01) H03G 1/04 (2006.01) H03G 3/30 (2006.01)

Patent

CA 2094133

An amplification circuit having a compensation circuit (10) for receiving a control signal and generating a corresponding compensation signal according to predetermined compensation characteristics. An input amplification circuit (12) is provided for, receiving an input signal and the compensation signal, amplifying the input signal at an input gain level determined by the compensation signal and providing a corresponding input amplification circuit output signal. A filter element (14) receives and filters unwanted frequency components from the input amplification circuit output signal. An output amplification circuit (16) is provided for receiving the filtered input amplification circuit output signal and the compensation signal, amplifying the filtered input amplification circuit output signal at an output gain level determined by the compensation signal and providing a corresponding output amplification circuit output signal.

Circuit d'amplification ayant un circuit de compensation (10) destiné à recevoir un signal de commande et à générer un signal de compensation en fonction de caractéristiques prédéterminées. Un circuit d'amplification d'entrée (12) est prévu pour recevoir un signal d'entrée et le signal de compensation, amplifier le signal d'entrée jusqu'à un niveau de gain d'entrée déterminé par le signal de compensation et fournir un signal de sortie correspondant du circuit d'amplification d'entrée. Un filtre (14) reçoit et filtre les composantes de fréquence non voulues pour les éliminer du signal de sortie du circuit d'amplification d'entrée. Un circuit d'amplification de sortie (16) est prévu pour recevoir le signal de sortie filtré du circuit d'amplification d'entrée et le signal de compensation, amplifier le signal de sortie du circuit d'amplification d'entrée, jusqu'à un niveau de gain de sortie déterminé par le signal de compensation et fournir un signal de sortie correspondant du circuit d'amplification de sortie.

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